Dispensing pump reset mechanism



July l2, 1955 B. w. Foss DISPENSING PUMP RESET MECHANISM 4Sheets-Sheet'. l

Filed Dec. 9, 1948 IN VEN TOR.

.Jggs M July 12, 1955 B. w. Foss DISPENSING PUMP RESET MECHANISMINVENTOR.

j??? m @M4/m Filed Dec. 9, 1948 July 12, 1955 B. w. Foss DISFENSING PUMPRESET MECHANISM INVENTOR. wzz dJ/@T 4 Sheets-Sheet 3 Filed Dec. 9, 1948United States Patent O DISPENSING PUMP RESET MECHANISM Burdette W. Foss,Fort `Wayne, Ind., assignor to Tokheim Corporation, a corporation ofIndiana Application December 9, 1948, Serial No. 64,397

17 Claims. (Cl. 222-2) rl`his invention relates to power resetmechanisms for dispensing apparatus or pumps, particularly for use inthe dispensing of gasoline and the like. More specifically, theinvention concerns hydraulically operated power reset mechanisms, andmeans for insuring the proper operating sequences and functioningthereof.

ln the use of registering gasoline dispensing pumps, it is customary toeffect the resetting of the register after each dispensing operation,such resetting preferably being elected immediately prior to the ensuingdispensing cycle. In my prior Patent No. 2,289,003, dated July 7, 1942,and entitled Automatic Reset Device for Computers, means are disclosedwhereby the register reset operations may be eected hydraulically, bymeans of iluid pressure generated by the pressure pump forming a part ofthe dispensing apparatus. In the copending Iapplication of Hill andFoss, Serial No. 731,636, filed February 28, 1947, now Patent No.2,595,259, and entitled Resetting Mechanism for Gasoline DispensingPumps, means are set forth for facilitating the proper functioning ofhydraulically operated power resetting mechanisms. The present inventionsets forth further improvements upon the prior devices, and concernsmeans and apparatus for precluding improper functioning, and forinsuring proper automatic functioning in `a desired cycle and sequence.

It is accordingly an object of the present invention to provide animproved power reset mechanism for liquid dispensing apparatus,particularly of the hydraulically actuated type.

More specifically stated, it is an object of the present invention toprovide an improved hydraulic reset mechanism for gasoline dispensingapparatus, wherein the performance of a predetermined automatic cycleand sequence in the operation of the parts is facilitated, and certaindii'liculties heretofore encountered in the operation of apparatus ofthe type dened overcome.

Various specific objects, advantages and features of the invention willbecome apparent from the following specification, when taken inconnection with the accompanying drawings, wherein certain preferredembodiments are set forth for purposes of illustration.

In the drawings, wherein like reference numerals refer to like partsthroughout:

Fig. l is a general assembly view, partly diagrammatic in form, of agasoline dispensing apparatus incorporating a hydraulic reset mechanismconstructed in accordance with and embodying the principles of thepresent invention, in accordance with one preferred embodiment thereof;

Fig. 2 is an enlarged detail view of the power mechanism for the resetforming a part of the structure of Fig. l and taken as indicated by theline 2-2 thereof;

Fig. 3 is a further enlarged detail View of a part of the structure ofFig. 2, on the line 3 3 thereof;

Fig. 4 is a detail perspective of the latch member shown in Fig. 3;

Fig. 5 is a detail view of the air separator mechanism forming a part ofthe structure of Fig. 1;

2,712,884 Patented July 12, 1955 ICC Fig. 6 is an enlarged sectionalview of the power reset mechanism;

Fig. 7 is a detail view of a portion of the structure of Fig. 6, takenas indicated by the line 7-7 thereof;

Fig. 8 is an enlarged transverse sectional View of the clutch, taken asindicated by the line 8-8 of Fig. 7;

Fig. 9 is a vertical sectional view of the clutch, on the line 9 3 ofFig. 8;

Fig. 10 is a detail sectional view of the delivery valve, forming a partof the structure;

Figure l1 is a detail view of the register reset shaft, and anassociated control switch, also forming a part of the reset mechnism,the view being taken as indicated by the line 11-11 of Fig. l; and

Fig. 12 is a wiring diagram of the structures illustrated in Figs. 1-11;

Fig. 13 is a View somewhat similar to Fig. 11, but illustrating amodified structural embodiment of the inven tion;

Fig. 14 is a view similar to Fig. 6, but illustrating a further modifiedstructure;

Fig. 15 is a wiring diagram for use with the structure of Fig. 14;

Fig. 16 is a partial view, similar to Fig. 1, but illustrating a stillfurther modied structure;

Fig. l7 is an enlarged detail view of la dash pot mechanism forming apart of the structure of Fig. 16;

Fig. 18 is a schematic or diagrammatic view showing the invention asapplied to a dispensing pump installation incorporating coin control;and

Fig. 19 is an electric wiring diagram of the structure indicated in Fig.18.

Referring more particularly to the drawings, and first to the structuralembodiment illustrated in Figs. l-12, in Fig. l there is shown adispensing apparatus, particularly adapted for the dispensing ofgasoline or the like, comprising a casing or housing 1o interconnectedby means of a pipe 12 with a suitable source of gasoline storage supply.The pipe 12 leads to a combined pump and air separator mechanism 14, thedetails of which are shown in Fig. 5 and will be later described. Theoutlet from the pump leads through a pipe 16 to a meter 13, and thenceby a pipe 2t? through a delivery valve 22 and a sight gauge 24 to aflexible hose 26 terminating in a dispensing nozzle 28.

In the operation of the foregoing mechanism, when the pump is in motionand the valve of the dispensing nozzle is open, the gasoline ispropelled through the meter, and through the delivery valve 22, theilexble hose, and the dispensing nozzle, to effect the dispensingoperation.

The meter 18 is arranged by means of a drive shaft 32 to effect theoperation of a price variator mechanism 34 and an associated register36, so as to eifect a volumetric and cost registration of the dispensedgasoline, in a manner which will be understood by Vthose familiar withapparatus of the type set forth.

The pump is arranged to be driven by a motor 3S under control of aswitch 40, the latter being actuated by means of a push rod 42 from amotor control switch lever 44 associated with the nozzle support hook46. More particularly, as shown in Figs. l and 2, the pivoted switchlever 44 is secured at one end to a link 46 connected at its upper endto a pivoted lever 48 arranged to actuate the rod 42. The arrangement issuch that as the switch lever 44 is raised upon removal of the hosenozzle from its support, the motor switch is closed, the switch beingopened upon the lowering of the switch lever as the nozzle is returnedto supported position at the end of a dispensing operation.

In accordance with the present invention the register mechanism isreset, by hydraulically actuated power means, at the beginning of andprior to each dispensing operation. As shown in Fig. 5, the pump and airsepa- Y rator mechanism 14 more speciiic'ally comprises a gear Withinthe separator mechanism there is an air and vapor escape orice 56leading to a oat chamber 5% having an associated oat 69 and return valve62, as will be understood. When the pumpris in operation the liquidchamber 64 is under pump pressure, whereas the float ber 5S thereof bymeans of a pipe 72.Y As shown in Fig.

6, the cylinder 68 encloses a piston 74 normally urged downwardly withinthe cylinder by means of a compression spring 76. The piston is securedto a rack 7S provided along one side thereof with a series of rack teetharranged for meshing engagement with a gear 80 secured to a shaft 82which extends laterally from the hydraulic cylinder and interconnectswith the reset mechanism of the register, as will be later described."it will be seen that at the inception of each dispensing operation,

as the pump is started, liquid under pressure will be forced throughpipe 70 into the reset cylinder 68 overcoming the action of spring 76and causing the piston 74 and rack 78 to move upwardly within thecylinder 68, from the position shown in Fig. 6. At the end of thedispensing operation, when the pump is stopped, the compression spring76 returns the piston and rack to the position shown in Fig. 6, theescape orifice 56 of the air separator'mechanism 14 functioning toaccommodate the liquid gasoline ejected from the reset cylinder 68during the downward movement of the piston. The conduit 72 functions toreturn any liquid gasoline which escapes past the piston 74 to the airseparator chamber 58. lt

will thus be seen that at the inception of each dispensing.

operation the rack 78 is given an upward stroke of movement, the rackreturning at the end of the dispensing operation, when the pump is shutoff.

The reset shaft 82 interconnectsrwith the reset shaft 84 of the registerby means of a clutch mechanism S6, the details of which are bestillustrated in Figs. 7,8 and 9. As shown, shaft S2 has secured thereto acollar S8, Fig. 9, which is in turn fixed to a housing member 90 formingthe driving element of the clutch. The clutch driven element comprises acollar 92 loosely journalled on shaft 82 and arranged for drivingengagement with the `register reset Vshaft 84. As best shown in Fig. 8,collar 92 is provided with a cam 94 of constantly increasing size, andhaving a shoulder 96 at a given point along the periphery thereof. Aclutch arm 9S is pivotally secured `to housing 90 as indicated at 109and is provided adjacentV its free end with a roller 102 adapted forcooperation with the surface of cam 94. A tension spring 1%'interconnects between a portion of the housing 90 and the end of' arm 98so as to maintain the roller 192 in engagement with the cam surface, atpredetermined pressure.

In the operation of the parts, as the hydraulically operated Vreset rack78 is raised a predetermined degree of rotation is imparted to driveshaft 82 which in turn, through the clutch 86, imparts motion to theregister reset shaft 84. The register mechanism 36 is preferably of thetype currently in commercial use, wherein during the resetting thereof,the register reset shaft partakes of a predetermined degree of movement,approximately l1/s revolutions, whereupon it reaches a positive stop andis then returned by spring mechanism within the register, throughapproximately 1A; of a revolution. The clutch functions to permit thestopping of the register shaft 34 when the positive register Astop isengaged, and the retrograde movement thereof, to complete the resetting,while the shaft S2 continues its motion in a resetting direction so asto permit a full stroke of operation of the hydraulically propelledreset rack 73. More specifically,

it will be seen that the roller im will drive the cam 94V until thepositive stop of the register is engaged where- Se to be arrested andpartially returned while motion Yof the reset drive shaft 8-2 continues.

ln accordance with the present invention means is provided for insuringthe proper sequence of operation of the parts, notwithstanding themanner in which the switch lever 44 may be manipulated by the operator,and notwithstanding erratic operating conditions which may beencountered in service such for example as temporary interruption of theelectric power, or the presence of undue quantities of air within thedispensing line, or the like. Referring to Figs. 2, 6 and 7, it will beseen that the upper end of rack 73 is provided with a cam shaped portion136 adapted for cooperation with a cap H93 forming a part of a plungermechanism lwhich cooperates with the motor switch control lever 44. Moreparticularly, cap 193 is screw threaded to a sleeve member 119, the capand sleeve being reciprocable Vas a unit within suitable bearing Vmeansformed in the cylinder housing 112. A compression spring 114 Y urges theplunger` assembly to the left as seen in Fig.V 6, so as to maintain thecap member ll in constant engagement with the surface of the rack. Aplunger pin 116 is' slidably mounted within the sleeve 11i), this pinbeing normally urged to the right to the limit of its travel within thesleeve by means of a compression spring 116. The projecting end ofplunger pin 116 is adapted for cooperation with a latch piece 120, Figs.6 and 7, having a recess 122, formed therein, and being fixed to one endof a pivot shaft 124 the opposite end of which has fixed thereto themotor control lever 4S, previously described.

lt will be seen that normally, when the reset rack 73 is in the positionshown in Fig. 6, the plunger pin 116 is withdrawn sufcientlyv so as topermit the free motion of latch 126 and of the motor lever 48, in eitherdirection. As the lever- 48 is-actuated to energize the motor, latch .20shifts clockwise, as seen in Fig. 7, to shift the recess 122 away frompin H6, so that as rack 73 is raised as the hydraulic pressure isapplied, shifting the cap 16S and the sleeve liti to the right as seenin Fig. 6, the pin 116 engages the surface M6 of latch 12) and ismaintained in engagement therewith continuously while the rack ,78 israised. Should the lever 44 he manipulated to shut oilc the motor,recess 122 is brought into alignment with the pin 116 and latchedthereby, so that the motor switch cannot again be operated to closedposition until the rack 78 has reached its lower limit of travel. Itwill thus be seen that after the motor has once been started, if it isshut oli, it cannot again be restarted until the rack 7S has reached itslowermost or home position. By this meaus'it is insured that at the endof a dispensing operation, when the motor is shut off, a new dispensingoperation cannot be attempted until-the rack V7S has been completelyrestored.

Referring to Figs. 2, 3 and 4, latch mechanism is provided forpreventing an inadvertent dropping of the rack 7S, in the event of amomentary interruptionrof electric power, or the presence of an excessquantity of air or vapor in the dispensing line, during a dispensingoperation. As shown, pivot shaft 1.24 carries atan intermediatepointthereon a latch member 28 which has a lost motion connection withthe shaft by means of Va' pin and slot connection. More particularly,shaft 124 has a pin 135` secured therein cooperable with a slot 132formed in the latch. The lower end of the latch is bifurcated asindicated at 134, the bifurcations being arranged to receivetherebetween a plunger pin 136 urged against the surface of the rack 78by means oi a leaf spring 138. In the normal position of shaft 124, whenthe motor switch 40 is deenergired, pin 130 is held sufliciently in acounterclockwise position, from the position shown in Fir'. 3, so as tomaintain the latch 12S counterclockwise and the plunger pin 136withdrawn from engagement with the rack. However, as the motor switch isenergized pin 13) moves clockwise to the position illustrated in Fig. 3which releases latch 128 and allows ilexure spring 138 to urge theplunger into engagement with the rack surface; so that when the rackreaches its extreme uppermost position, which condition is depicted inFig. 3, a recess 140 formed therein comes into alignment with theplunger pin, the plunger pin dropping into the recess to hold the rackelevated until shaft 124 is 2 again shifted counterclockwise as themotor switch 40 is manually deerlergized. Accordingly it will be seenthat when the rack has once reached its uppermost position, it ismaintained therein, notwithstanding the loss of duid pressure within thehydraulic cylinder 68, until the end of the dispensing operation whenthe shaft 124 is actuated upon the manual opening of the motor switch.By this means loss of pressure in the hydraulic cylinder, which mayoccur upon a momentary power failure or upon the presence of excess airin the dispensing line, results in no movement of the racl; 7S from itsmain' tained uppermost position.

To further insure a proper operating sequence of the reset mechanisms, acontrol switch structure is provided as illustrated in Figs. l and ll,cooperable with the delivery valve 22. Referring to Fig. ll, a portionof the righthand side wall of the register is illustrated, as seen inFig. l. The end of the reset shaft, which projects through this wall ofthe register, is indicated by the reference numeral 84. As previouslyindicated, the register 36 is preferably of the type now in commercialuse with gasoline dispensing apparatus. In such register mechanismsthere is secured to the reset shaft a cam disc 142 having a slotcooperable witil a pin 144 acted upon by a tension spring 146 andcarried by a cam plate 14S. The arrangement is such that as the resetshaft 34 and the cam disc 142 are rotated, during a resetting operation,a countercloclrwise are of motion of approximately 45 is imparted to thecam plate 148, the cam plate being restored to normal position at theend of the resetting operation by the action of spring 145, and duringthe 1/s revolution of retrograde movement of the reset shaft S4,previously mentioned.

As shown in Fig. ll, the cam plate 143 is fixed to a shaft which shaftcarries an arm 152, the latter being arranged to reciprocate a plungerpin 154 as the cam plate 148 is operated. Plunger 154 cooperates withthe actuating arm 156 of an electric switch mechanism 158 disposedwithin a housing 160, the arrangement being such that as the cam plateis shifted counterclockwise during a resetting operation plunger 154 isactuated to the right to open the electric contacts of switch 153.

The switch 158 is arranged to control the delivery valve 22, previouslymentioned, and illustrated in detail in Fig. l0. The valve comprises acasing 162 having a valve member 154 therein, the valve being arrangedwhen open to permit iiow Within the dispensing line 20, as here toforedescribed. The valve is normally urged into closed position bycompression spring 166, and is arranged to be thrust upwardly into openposition by a solenoid 163 operable upon an armature 176 formed as apart of the valve stem.

The circuit diagram is illustrated diagrammatically in Fig. l2. It willbe seen that the motor control switch 40 is arranged to interconnect themotor 38 between the power lines L1 and L2, in the usual manner so thatthe lll motor is energized during such time as the switch is closed. Itwill furthermore be seen that the switch 158 is in series with switch40, the arrangement being such that the valve solenoid 168 is energizedwhen both switches are closed. As has been described, switch 158 isnormally closed, but is maintained open by cam 14S of the register resetmechanism during resetting. Accordingly the delivery valve solenoidcannot be energized to permit dispensing during resetting, but onlyafter the completion 0f the reset when both switches 40 and 158 areclosed. By this means if the switch 4i) should be opened, inadvertentlyor by design, immediately after being closed and prior to the completionof the reset, it will be seen that a dispensing operation cannot beeffected until the reset has been completed. If the motor switch isopened very shortly after being closed, and prior to the completion ofthe reset, rack 78 will be raised a part only of its stroke and thenlowered, thus effecting a partial reset of the register. Upon thereclosing of the motor switch 40, and the maintained closing thereof,rack 78 will be raised upwardly through a full stroke of operation. Thedistance of travel of the rack is such that upon a full stroke ofoperation thereof more than one revolution of operation is imparted tothe register reset mechanism. Thus even though the register may havebeen partially reset by a partial stroke of operation of the rack, asabove, one or two additional full strokes of movement of the rack by theproper manipulation of the motor switch will move the register throughzero and then suciently to effect a complete reset. The control switch158 and the delivery valve 22 insure that a dispensing operation cannotbe effected while the register is in a partially reset condition, andprior to the complete resetting thereof.

By reason of the several control devices, thus provided, the properoperation of the hydraulic reset mechanism is insured regardless of howthe motor control switch 40 may be manipulated by the operator, andnotwithstanding temporary electric current interruptions, excess air inthe air separator, or other normally encountered operating conditions.

In Fig. 13 a modilied structure is illustrated wherein the deliveryvalve, indicated by the reference numeral 22a and corresponding instructure and function to the valve 22 previously described, ismechanically rather than electrically controlled from the reset cam ofthe register. As illustrated, the rockable reset shaft a, which isshifted counterclockwise through a displacement of approximately 45during reset, is provided with a cam member 174 secured thereto. Thiscam cooperates with a pivoted lever 176 arranged to engage the elongatedstem 17S of the valve member 164:1, the arrangement being such that thevalve is normally open and is lowered to closed position during aresetting operation.

In Figs. 14 and l5 a further modified embodiment is illustrated whereinthe delivery valve is mechanically operated by the reset rack, andwherein there is provided a quick acting and slow release solenoidmechanism for controlling the operation of the motor, so as to insure aproper sequence in the actuation of the reset parts.

Referring to Fig. 14, it will be seen that the delivery valve 22b is inthis instance located in a position (as indicated in Fig. 16)immediately above the reset cylinder 68h and its associated parts. Therack 78b is so arranged that in its extreme uppermost position it willengage the valve stem 180 of the delivery Valve 164b, and effect theopening thereof. Referring to Fig. l5, the wiring diagram for thearrangement is illustrated wherein the motor is indicated at 38h and themanual motor control switch at 40b as shown. The closing of switch 40helfects the energization of a quick acting slow release solenoid 182which in turn is arranged to actuate a switch 184 which when closedenergizes the motor 38h.

With the arrangement described even a momentary closing of the motorswitch 4% will maintain the solenoid opening thereof, while the rack 7bis raised. The latchV structure of Fig. 3 will also be used in thestructural embodiment of Figs. 14 and l5, performing the function of Ymaintaining the rack raised during the dispensing operation,notwithstanding excess air in the dispensing ine or momentary electricpower failure. When the raclt 13b Visraised, and so long as it ismaintained raised to its uppermost position, the delivery valve 1641? isheld open so that a dispensing operation can be effected.

In Figs. 16 and 17 a modified arrangement is shown Vfor mechanicallyelfecting the functions of the solenoid 182 referred to in reference toFigs. 14 and l5. ln Figs. l6 and 17 the physical structures are the sameas contemplated in Fig. 14, the only difference being that the motorswitch 40C and the associated motor 38C may be directly interconnected(for example as illustrated in Fig. 12) and the functions of thesolenoid 182 of Fig. l5 are effected by a mechanical dash pot mechanismgenerally indicated by the reference numeral 190.

More particularly, referring torFig. 17, it will be seen that this dashpot mechanism comprises a cylinder 192 filled with suitable liquid suchas oil, and having a piston 194 reciprocable therein. Y of predeterminedsize extending therethrough so as to restrict oil flow and limit theYdownward motion of the piston under actuation of compression spring 198to a predetermined slow speed. The piston is further provided with acheck valve 260 which permits of a rapid upward movement of the pistonas the oil passes therethrough.

`The piston is secured'to a rod 202 which is connected .at

its upper end to the outer portion of a crank 204 forming the switchcontrol arm of the switch stucture 40e. The draw rod 42e is providedwith a collar 206 at its lower end, the Vcollar normally being held inengagement with a lug 20S by a compression spring 210, thelug 208 vbeingpivotally mounted on the arm 204 in any suitable manner. Alternativelyand preferably, it is preferable not to use spring 198 since the spring210 will accomplish the same function as spring 198.

In operation, as the rod 42C is raised upon lifting of the hose nozzlemotor control lever 44C, the arm 204 is correspondingly lifted thereby,at a permissible rapid rate, to close the motor switch. However, shouldthe .rod 42C immediately thereafter be lowered, the movement of thepiston 194 is sufficiently retarded by the oil dash pot action so thatthe switch 40C remains closed at least suli-A ciently to insure acomplete upward stroke of operation of the reset rack.

ln Figs. 18 and 19 an embodiment is illustrated similar to thatdescribed in reference to Figs. l-lZ, but wherein the structure isadapted for use with a coin control dispensing installation. In Fig. i8a pump housing is indicated at 10d functionally similar to the casingand structure 19 previously described, there being, however, a coin.control mechanism 220 associated therewith for controlling theactuation of the dispensing pump under coin -control VThe details of thecoin control mechanismV con- V,stitute no part of the present invention,except in so far as they cooperate with the structures thereof, suice tosay that the coin unit 220, Fig. 19, includes a switch structure 222which is closed by the introduction of the coins and Vwhich remainsclosed until the value of the gasoline represented by the coinsdeposited hasbeen dispensed, or by returning the nozzle to the hook orsupport which breaks the current to the motor because of switch 40d atany The piston has an orifice 196 time before the full amount ofgasoline is dispensed for f which coins have been deposited. The unusedportion of the coins will be returned to the customer.

ln accordance with the present invention the manual motor switch asindicated at 40d is in series with the coin switch 222, the arrangementbeing such that when both switches are closed the pump motor 38d isenergized in a circuit functionally similar to that previously describedin reference to Fig. l2. The circuit further includes a control switch15861 functionally similar to the switch 153, Fig. l2, previouslydescribed, the arrangement being such that when all of switches 222, 40dand 158d are closed, the control solenoid 168e' of the delivery valve isenergized to open the valve and permit the dispensing of gasoline. Inthis manner the features of the invention are so combined with the coincontrol as to permit conjoint control of the delivery valve, without thenecessity for duplication of valve structures. Y

It is obvious that various changes may be made in theV the passage ofliquid through said line, a motor for operating the pump, a meteroperable in accordance with the liquid propelled through the line, aregister operated by the meter and having a reset shaft, hydraulicallyoperable reset mechanism for the register powered by the motor, andmeans operated by said reset shaft for operating said dispensing controlmeans to prevent dis-k pensing until completion of the operation of thereset mechanism.

2. A liquid dispensing apparatus comprising Va .dis-k pensing lineadapted to be connected to a lsource of liquid supply, a valvecontrolling, dispensing of lliquid from said Vline, a pumpV forpropelling liquid through the dispensing line, a motor for operating thepump, a meter operable in accordance with the liquid propelled throughthe line, a register operated by the meter and having a reset shaft,hydraulically operable reset mechanism Vfor the register powered by themotor, and means on said reset shaft controlled by the resetting of theregister for preventing opening the dispensing valve during theoperation of the reset mechanism.

3. A liquid dispensing apparatus comprising a dispensing line adapted tobe conneted to a source of liquid supply, a pump for propelling liquidthrough the dispensing line, a motor for operating the pump, a meteroperable in accordance with the liquid propelled through the line, aregister assembly operated by the meter and including hydraulicallyoperable reset mechanism powered by the motor and a member shifted bythe register assembly to one position during resetting of the registerassembly and to another position upon the completion of the reset, andmeans controlled by said member for disabling the dispensing apparatus.

4. A liquid dispensing apparatus comprising a dispensing line adapted tobe connected to a source of liquid supply, a pump for propelling liquidthrough the dispensing line, a motor for operating the pump, a meteroperable in accordance with the liquid propelled throughY the line, aregister operated by the meter, hydraulicallyr operable reset mechanismfor the registery powered by the motor, a control member shifted-in`accordance with the movement of the register, and means including adelivery valve in the dispensing line Ycontrolled by said con-4 pensingline adapted to be connected to a source of liquid supply, a pump forpropelling liquid through the dispensing line, a motor for operating thepump, a meter operable in accordance with the liquid propelled throughthe line, a register assembly operated by the meter includinghydraulically operable reset mechanism powered by the motor and a resetshaft carrying a control member, and means including an electric switchoperated by the register assembly control member for disabling thedispensing during the operation of the reset mechamsm.

6. A liquid dispensing apparatus comprising a dispensing line adapted tobe connected to a source of liquid supply, a pump for propelling liquidthrough the dispensing line, a moto for operating the pump, a meteroperable in accordance with the liquid propelled through the line, aregister assembly operated by the meter including hydraulically operablereset mechanism powered by the motor, a reset shaft, and a controldevice driven by said shaft, a delivery valve in the dispensing line,and an electric switch operated by the register assembly control devicecontrolling the closing of the valve to prevent dispensing during theoperation of the reset mechamsm.

7. A liquid dispensing apparatus comprising a dispensing line adapted tobe connected to a source of liquid supply, a pump for propelling liquidthrough the dispensing line, a motor for operating the pump, a meteroperable in accordance with the liquid propelled through the line, aregister assembly operated by the meter including hydraulically operablereset mechanism powered by the motor, a delivery valve in the dispensingline for controlling liquid ow therethrough, a member shifted by theregister during resetting, and a mechanical linkage interconnecting saidmember and valve to maintain the valve closed during register resetoperations.

8. A liquid dispensing apparatus comprising a dispensing line adapted tobe connected to a source of liquid supply, a pump for propelling liquidthrough the dispensing line, a motor for operating the pump, a meteroperable in accordance with the liquid propelled through the line, aregister assembly operated by the meter including hydraulically operablereset mechanism powered by the motor, said reset mechanism including anactuator shiftable through a predetermined range of movement, a controlmember mechanically coupled to said reset mechanism, a manual controlswitch for the motor, a latch controlled by the manual control for theswitch for holding the actuator in predetermined position, and meanscontrolled by the register assembly control member for disabling thedispensing apparatus during the resetting thereof.

9. A liquid dispensing apparatus comprising a dispensing line adapted tobe connected to a source of liquid supply, a pump for propelling liquidthrough the dispensing line, a motor for operating the pump, a meteroperable in accordance with the liquid propelled through the line, aregister assembly operated by the meter including hydraulically operablereset mechanism powered by the motor, said reset mechanism including anactuator shiftable through a predetermined range of movement, a controlmember mechanically coupled to said reset mechanism, a manual controlswitch for the motor, means controlled by the actuator in a givenposition thereof for disabling the operation of the control switch, andmeans controlled by the register assembly control member for disablingthe dispensing apparatus during the resetting of the register assembly.

10. A liquid dispensing apparatus comprising a dispensing line adaptedto be connected to a source of liquid supply, a pump for propellingliquid through the dispensing line, a motor for operating the pump, ameteroperable in accordance with the liquid propelled through the line,a register assembly operated by the meter including hydraulicallyoperable reset mechanism powered by the motor, said reset mechanismincluding an actuator shiftable through a predetermined range ofmovement, a manual control switch for the motor, means controlled by theactuator in a given position thereof for disabling the operation of thecontrol switch, means controlled by the manual control for the switchfor latching the actuator in predetermined position, the last namedmeans including a lost motion connection, and means controlled by theregister assembly for disabling the dispensing apparatus during theresetting of the register assembly.

ll. A liquid dispensing apparatus comprising a dispensing line adaptedto be connected to a source of liquid supply, a pump for propellingliquid through the dispensing line, a motor for operating the pump, ameter operable in accordance with the liquid propelled through the line,a register operated by the meter, hydraulically operable reset mechanismfor the register powered by the motor, a control mechanism for themotor, and means for limiting the minimum motor operation when energizedwhereby to insure a complete operation of the hydraulic reset mechanism.

12. A liquid dispensing apparatus as deiined in claim l1, wherein saidlimiting means comprises a slow acting electrical relay.

13. A liquid dispensing apparatus as defined in claim l1, wherein saidlimiting means comprises a mechanical dash pot mechanism.

14. A liquid dispensing apparatus comprising a dispensing line adaptedto be connected to a source of liquid supply, a pump for propellingliquid through the dispensing line, a motor for operating the pump, ameter operable in accordance with the liquid propelled through the line,

va register operated by the meter, hydraulically operable resetmechanism for the register powered by the motor, said reset mechanismincluding an actuator operable through a predetermined stroke ofmovement, a manual control member for the motor, means controlled bysaid member for latching the actuator in predetermined position, andmeans for limiting the minimum energization of the motor whereby toinsure a complete stroke of operation of said actuator.

15. A liquid dispensing apparatus comprising a dispensing line adaptedto be connected to a source of liquid supply, a pump for propellingliquid through the dispensing line, a motor for operating the pump, ameter operable in accordance with the liquid propelled through the line,a register operated by the meter, hydraulically operable reset mechanismfor the register powered by the motor, said reset mechanism including anactuator operable through a given stroke of travel, means for preventingenergization of the motor when said actuator is in a predeterminedposition, and means for limiting the minimum energization of the motorto insure a full stroke of operation of the actuator when the motor isenergized.

16. A liquid dispensing apparatus comprising a dispensing line adaptedto be connected to a source of liquid supply, a pump for propellingliquid through the dispensing line, a motor for operating the pump, ameter operable in accordance with the liquid propelled through the line,a register operated by the meter, hydraulically operable reset mechanismfor the register powered by the motor, said reset mechanism including anactuator operable through a given stroke of travel, a manual controlmember for the motor, means operable by the control member for latchingthe actuator in predetermined position, means for locking the controlmember from operation when the actuator is in a predetermined position,and means for limiting the minimum operation of the motor when energizedto insure a complete stroke of operation of the actuator.

17. A coin controlled liquid dispensing apparatus, comprising adispensing line adapted to be connected to a source of liquid supply, apump for propelling liquid through the dispensing line, a motor foroperating the Y 1 1 pump, dispensing control means for'controlling thepassage of liquid through said line, a meter operable in accordance withthe liquid propelled through the line, a register operated by the meterand having a reset shaft, coin operated mechanism, hydraulicallyoperable reset mechanism for the register, and dispensing controlmechanism conjointly controlled by actuation of the coin operatedmechanism and by said register reset shaft, said dispensing controlmechanism including means controlled by the reset shaft and controllingsaid dispensing control l means to prevent dispensing until thecompletion of the operation of the reset mechanism.

References Cited in the le of this patent UNITED STATES PATENTSAlexander July 12, 1932 Goss Apr. 3, 1934 Yeomans Nov. 26, 1940 FossJuly 7, 1942 VPressler Nov. 20, 1951 Trexler Apr. 15, 1952 Hill et alMay 6, 1952

